Process for spinning artificial-silk waste



UNITED STATES PAT T OFFICE.

WILLIAM R. HALL, OF NAIBJBERTH, PENN 'SYLVANIA, ASSIGNOR TO 8. FEATHER COMPANY, A CORPORATION OF DELAWARE.

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11 Drawing.

To all whom it may concern: I

Be it known that I, WILLIAM R. D. HALL,

' a citizen of the United States residing at finer by far than the Narberth, in the county of Montgomery and State of Pennsylvania, have invented new and useful- Improvements in Processes for Spinning Artificial-Silk Waste, of which the following is a specification.

It is a well-known fact that the use of artificial silk waste has been tremendously restricted, especially in the use of the same with respect to yarn, etc., for the reason that, contrary to real silk Waste, the fiber oi the artificial silk waste cannot be spun out to a very fine thread i. -e. finer than about 20,160 yards to the pound, due to the smooth and slippery nature of the fiber.

I have now invented a process whereby yarn may be produced, having as its base artificial silk waste, which yarn may be arn heretofore produced from artificial sllk waste.

I accomplish the above by adding to artificial silk waste 18 per cent. of real silk waste, subsequentlymixing and intertwining the fibers one with the other and then treating the whole with 5 per cent. of lard oil. This'mixture is then spun out and-the results desired are obtained.

It will be noted, however, that the silk ,waste must nearly approximate the artificial silk waste in luster so that the small addition of real silk waste to the artificial silk waste does not, to an appreciableextent detract from the luster of the finished arn, which luster, as is known, is ve in the' yarn derived from artificial silk.

br' liant waste.

It will also be noted thatinot alone do I accomplish the production of afiner yarn by the above process, but after the yarn has been manufactured a very unique {effect may l e-obtained due to the fact that the silk waste is an animal product and the, artificial silk waste is a vegetable fiber. The

Specification of Letters Pateiit. Patented May'11, 1920, 1 Application filed J 'une L26, 1918. Serial No; 242,111. 1 V

result above referred to 1s reached by treating the yarn with a dye which does not act upon vegetable fiber, or vice versa upon animalfiber. It will be seen that by using either one of these dyes, one of the fibers will retain its natural color whereby a ve novel effect is produced. On the other han the whole may be treated with what is known as a union dye to color the same a constant shade.

It will be noted that by summing up the above results, in combining the artificial silk waste to the real silk waste it is possible to spin the artificial silk waste to a .much finer thread than if the same had been used alone.

The addition of the real silk' waste to the artificial silk waste does not noticeabl detract from the luster of the yarnpro need from the latter. a

Novel effects can be obtained in dyeing by the use of a dye which may acteither upon animal fibers or ve etable fibers,'and the same result can be o tained in dyeing the finished product as'though no real waste had been used.

-Having described my invention, what I claim is 1; The process of producing am of very fine diameter from artificial SlllZ waste, said process consisting in mixing artificial silk Waste with real Sllk waste in, the proportion of about 82 per cent. of the former and 18 with oil, and spinning such treated mixture.

2. In the production of yarn, the mixture of artificial silk fiber and real silk waste of approximatel the same luster, treating the whole with oi and spinning such mixture.-

' WILLIAM R. n. HALL. 

